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        <h1 id="hover动画的元素关系使用场景">
            
            hover动画的元素关系使用场景
            
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        <p>CSS  hover 在网页设计中是极为常用的一个 CSS 效果，那么如何通过#a元素的hover实现#b元素的hover样式控制呢<a id="more"></a>？</p>
<h2 id="hover基本用法："><a href="#hover基本用法：" class="headerlink" title="hover基本用法："></a><strong>hover基本用法：</strong></h2><figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="selector-id">#a</span><span class="selector-pseudo">:hover</span>&#123;</span><br><span class="line">    <span class="attribute">color</span>: red;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h3 id="情景一：两个是兄弟元素"><a href="#情景一：两个是兄弟元素" class="headerlink" title="情景一：两个是兄弟元素"></a>情景一：两个是兄弟元素</h3><figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="selector-id">#a</span><span class="selector-pseudo">:hover+</span><span class="selector-id">#b</span>&#123;</span><br><span class="line">    <span class="attribute">color</span>: red;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h3 id="情景二：两个是父子元素"><a href="#情景二：两个是父子元素" class="headerlink" title="情景二：两个是父子元素"></a>情景二：两个是父子元素</h3><figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="selector-id">#a</span><span class="selector-pseudo">:hover</span> <span class="selector-id">#b</span>&#123;</span><br><span class="line">    <span class="attribute">color</span>: red;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h3 id="情景三：两个是兄弟元素-改变的是一个兄弟元素的子元素"><a href="#情景三：两个是兄弟元素-改变的是一个兄弟元素的子元素" class="headerlink" title="情景三：两个是兄弟元素,改变的是一个兄弟元素的子元素"></a>情景三：两个是兄弟元素,改变的是一个兄弟元素的子元素</h3><figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="selector-id">#a</span><span class="selector-pseudo">:hover+</span><span class="selector-id">#b</span>&gt;<span class="selector-id">#c</span>&#123;</span><br><span class="line">    <span class="attribute">color</span>: red;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>


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        <ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#hover基本用法："><span class="toc-text">hover基本用法：</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#情景一：两个是兄弟元素"><span class="toc-text">情景一：两个是兄弟元素</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#情景二：两个是父子元素"><span class="toc-text">情景二：两个是父子元素</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#情景三：两个是兄弟元素-改变的是一个兄弟元素的子元素"><span class="toc-text">情景三：两个是兄弟元素,改变的是一个兄弟元素的子元素</span></a></li></ol></li></ol>
        
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